Machine for applying liquid cement.



J. & R. GELL.

MACHINE FOR APPLYING LIQUID CEMENT.

APPLICATION FILED MAY 2,1912.

1,1 19,271. Patented Dec. 1,1914.

3 SHEETS-SHEET 1.

J. & R. GELL.

MACHINE FOR APPLYING LIQUID CEMENI'.

APPLICATION FILED MAY 2 Hi2 1 1 1 9,27 1 Patented Dec. 1. 1914.

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MACHINE FOB. APPLYING LIQUID CEMENT.

APPLICATION FILED MAY 2,1912v 1,1 19,271, Patented Dec. 1,1914.

3 SHEETS" SHEET 3.

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I NW A c F5 1 I H a A wk J fl r 1 a1 H\\ a 7 46 WINEEEES: U lr\l\/E:\J [1R5 a \\\\w c fl wffiwp/ 1 I w JOHN GELL AND ROBERT GELL, OF ROCHESTER, NEW YORK.

MACHINE FOB APPLYING LIQUID CEMENT.

Specification of Letters Patent.

Patented Dec. 1, 1914.

Application filed Kay 2, 1912. Serial No. 694,624.

To all whom it may concern lle it known that we, JOHN Gnu. and ROBERT GnnL, citizens of the United States, and residents of Rochester, in the county of Monroe and State of New York, have mvented a new and Improved Machine for Applying Liquid Cement, of which the following is a specification.

This invention relates to means for applying liquid cement to articles in general and, also, to means for regulating the coating of cement applied thereby to the articles to be cemented, comprising adjustable means for variably predetermining the depth to which the articles to be coated may be inserted within a bath of the cement in liquid form.

In the accompanying drawings we have shown that embodiment of our invention 2 more especially adapted to ap lying glue to the dovetailed ends of the s1 es of wooden boxes without, however, limiting ourselves to such or any embodiment or application thereof. In applying the glue to the ends of the sides of such boxes, it is im ortant ported below the surface of the glue therein a distance substantially equal to the length of the tenons formed on the ends of the sides to the box, or the depth which the articles are to be inserted in the liquid glue.

In the use of such a device, however, the

liquid glue above the shelf separates and becomes coated with a thin layer of chilled glue which adheres in strings to the articles to which it is applied causing very unsatis- 40 factory results in that considerable quantities of glue are wasted and the work is more or less smeared therewith. To overcome this difficulty we provide a reciprocatin blade located and operating beneath the s elf in 46 such a way as to maintain a constant circulation of the glue through the openin or holes in the shelf. In the use of suc an apparatus it is diflicult to regulate the flow of glue to the glue applying reservoir in 60 such a way as to maintain a constant depth thereof above the perforated shelf, as it fiequently happens that the workmen do not handle or treat the sides of the boxes or articles to be glued with uniform rapidity or in uniform quantities so that even were the rate of supply of glue to the glue applying reservoir maintained practically constant and at such a rate as to maintain a constant level for any particular rate or speed of a plying the same to the ends of the box si es or articles to be cemented, a constant level for the glue in the a plying reservoir can not be maintained. 0 overcome this latter ditliculty we regulate the rate of supply of glue to the app 'ng reservoir so that the same will be shghtl in excess of the demand, and we provi e a. pumping mechanism adapted to return to the glue heating reservoir the surplus glue in the glue applying reservoir tending to accumulate above an adjustably predetermined depth over the shelf.

The accompanying drawings showing such an embodiment of our invention are as follows,

Figure 1 is a plan view of our lue applying machine, while Fig. 2 is an e evation of the same as seen from the lower side thereof relative to Fig. 1. Fi 3 is a transverse sectional view taken a ong the line H of Fig. 1. Fig. 4 is a front elevation of the machine, as seen from the left relative to Figs. 1 and 2, with parts of the heating jacket and glue applying reservoir broken away. Fig. 5 is an enlarged detail view of the pumping mechanism showing parts of the main body of the machine in section. Fig. 6 is a vertical central sectional view through the pump itself, and Fig. 7 is a. detail thereof to be explained.

Similar parts are designated by similar letters of refer nce.

Referring to the drawings, the main body ortion of the machine, comprising a heating jacket T conformed as shown in Figs. 2, 3 and 4, is supported u on suitable le t secured to the under si e thereof. his heating jacket is formed in two parts, '1" and T the latter part shown to the right in Figs. 1, 2 and 3, aving side walls extending all around the same and terminating at their upper edges in a continuous flange f. The front wall it extends only part way down to the bottom t and has at its lower edge a forwardly extending flange f which, in the preferably integral casting compris ing the entire heating jacket, is extended into and is continuous with the flanges f on 'Within the glue heating the upper edges of the side walls 1' of the front and shallow portion T of the jacket T. The front and rear ortions T and T of the jacket T have their two opposite side walls extending in the same plane.

A glue pot 1 is supported within the portion T of the jacket T by a continuous flange extending outwardly from the side walls t iereof, near the top, resting upon. and bolted to the flange f extending around the top of the four Walls of the portion T of the heating jacket. A glue a plying reservoir D is similarlysu ported y means of flanges f within the orward portion T of the acket. The glue heating pot and the glue ap lying reservoir are spaced from and inside of the walls of the heating jacket in order that the steam or hot water may extend around and on all sides thereof and within the jacket T. The bottoms of the reservoir D and of the glue heating pot P are slightly inclined. downwardly to the front thereof as indicated in F 3 in order that the contents may be draine therefrom.

0t P there is provided a partition 2 extending from front to rear and located nearly in the center thereof dividing such glue pot into two portions, the larger one 0 which 1 is for recelving the glue to be heated and melted, and this partition p is provided with an opening 0 therethrough at its lower edge and near the front to provide a passage for the glue from the larger portion 1 into the discharging reservoir 2. This discharging reservoir 2 1s separated by a transverse partition 2 rom a chamber 3 of nearly equal size and similar proportions, which is provided with a cover J having two circular openings therethrough 7' each adapted to receive the usual portable glue pot J. The glue as it is heated and melted in reservoir .1 passes through the o ening 0 in the partition into the disciiarge reservoir 2 and out t rough the discharge pipe 0, threaded through the boss on the lower front wall thereof, and through the regulating valve V threaded onto such discharge pipe.

The glue applying reservoir D is provided with a drainage pipe '0, which is normally closed by a valve V, for the purpose of draining the contents therefrom. The jacket T is also provided with a drainage ipe O, secured in the boss on the bottom wa thereof at its front edge, and is provided with a valve V for normally closing the same, and for this purpose the bottom of the jacket T may be slightly inclined referably to the front to more completely rain the contents therefrom.

An intake pipe 0 connected with any suitable supply of steam or hot water is provided, while an overflow or discharge pipe 0 is also provided in order to permit of a continuous intake of steam or hot water into the jacket T. A perforated shelf I is suitably supported within the reservoir D and upon lugs d at the corners thereof.

Extending to the rear from the jacket T are seen two brackets Z in which are formed bearings a for a shaft S carryin the usual loose and tight pulleys U and for operating the shaft; and on this shaft there is also secured a spur gear g meshing with a larger spur gear G secured upon a shaft S 'ournaled-in bearings 2 also carried by the rackets Z. On the outer end, being the lower end in Fig. 1 and the end toward the observer in Fi 2, of the shaft S is secured a crank disk provided with a crank pin u on which is secured a revoluble sleeve 11; W ich'is pivotally secured by means of the usual set screws to the bifurcated head r on the rear end, or right hand end with reference to Fig. 2, of the connecting rod R, having on its left hand end in turn the bifurcated head r makin ivotal connection with the short linkr i urcated at its forward, or "'left hand end with reference to Fig. 2 and pivotally secured to one end of the bell crank lever L, to the other end of which there is pivotally secured the bifurcated head 1:? on. the right hand end, with reference to Fig. 4, of the connecting rod It having on its eft hand end the bi urcated head 1' pivotally connected in turn with the crank L on the upper end of a shaft M, rotatable in bearings bb formed on the front wall t of the rear portion of the jacket T and held against Ion itudinal and vertical. movement within such arings by means of collars. secured on such shaft, as indicated. The lower end of this shaft M extends, through an o ening therefor in the perforated shelf fand has secured thereon below each shelf, a blade M adapted on the oscillation of the shaft M to move to and fro within the reservoir D beneath the shelf I for: the purpose hereinafter explained.

The bolt or stud made use of for pivotally connecting the bifurcated head 1' with the bell crank lever L extends upwardly through a sleeve 1"- rotatably secured thereon and pivotally connected with this sleeve is seen the bifurcated head 1" on the right hand end, with reference to Fig. 4, of the connectin rod R, having on its left hand end the bifurcated head 1' pivotall connected with the upper end of the bel crank lever L oscillably supported upon a stud a and held in place thereon by any suitable mechanism such as a cotter key. This stud s is secured in a bracket b extending downwardly from and secured on the under side of the flange f at the front side of the rear section of the heating jacket T. The other arm of this bell crank lever L is pivotall connected with the bifurcated head r a justably secured on the upper end of the connecting rod R, on the lower end of which is adjustably secured a bifurcated head 1' pivotally connected, as seen, with the extension 6 formed on the upper end of the pump plunger E reciprocating vertically within the bore a of the pump body A.

The pump body A is formed preferably from an integral casting provided with lugs or ears h by means of which the same is secured by bolts, extending through suitable spacing blocks as'indicated, to the rear wall of the reservoir D. This casting A is bored out to form a chamber at having a duct (1 at its lower end extending into the bored channel a which may be closed by means of a screw plug a and which, also, connects with the vertical channel a having at its upper end a valve seat provided for the ball valve a, above which is seen the chamber a threaded at its upper end to receive the connecting member is to which in turn there is threaded the pipe K leading upwardly and discharging into the heating reservoir 1.

Through the body A of the pump there is formed an opening 0 the relative size and location of which is indicated in Fi s. 5 and 7 In front of this opening a an for the purpose of efl'ectin a predeterminably variable closure thereo there is provided a plate 0 vertically slidable upon the screws n, engaging through slots therefor in the plate C and threaded into the body A as indicated in Fig. 5, and held in any'desired position of vertical adjustment by means of the thumb nut N threaded onto a stud secured in the casting A and extendin through a slot therefor in the plate C. T e upper end of the plate C may have an extension adapted to be engaged by the hand of the operator; while at the left hand edge of the plate there may be formed an indicator cooperating with a scale, marked off on the face of the body A, to age and indicate the different depths to w ich the glue is permitted to rise above the perforated shelf I by the correspondingly different adjustments of the plate C. An openin as indicated at o, is provided through t e front wall of the pump body A extending into the chamber a at its lower end at a point just where the contents will be drained therefrom when the swinging button release valve m is moved to the open position indicated in Fig. 5, the valve m being normally positioned to close the opening 0. This valve m is provided in order to drain off the glue at any time when the machine is to become idle so that the valve may not be set in the glue or the glue permitted to harden around the valve (1 at the lower end of the chamber a.

In the use of such a machine, it frequently happens that chips and like articles from the articles being glued gather and accumulate on the surface of the glue in the reservoir D which would interfere with tllv proper action of the pump and the valve /9. To prevent such chips from enterin through the opening a there is provide a shield A, seen in Figs. 3, 5 and 7, formed of thin sheet metal screwed to the body of the pump A and extending outwardly and forwardly from the body of the pump A so as to permit the glue to enter thereunder and between the same and the front face of the pump and into and through the opening 0 in the pump body.

In using our glue applying machine the reservoir 1 in the glue heating pot P is filled with the glue to be heated and melted which, as it is heated and melted, passes through the opening 0 into the discharge reservoir 2 and therefrom outwardl through the discharge pipe v, the rate 0 flow therethrough being regulated by the valve V. The glue in the heating pot P and in the applying reservoir D is maintained at the desired temperature by the means and in the manner already indicated. The glue as it escapes into the reservoir D is allowed to rise in the reservoir D to the height determined by the adjustment of the plate C. Power is applied in the usual way, preferabl by means of a belt engaging over the pu ley U causing the shaft S to rotate, from which, in turn, the shaft S is rotated through the connections already described; the rotation of which upper shaft S causes, through the mechanism already described, the to and fro movement of the blade M and also causes the operation of the pump already described. The plate C is adjusted so that the bottom of the opening therethrough 0 is at the level of the .top of the glue which it is desired to maintain abovethe shelf I, and the vertical adjustment of this plate C is sufiicient to provide in this way for an desired depth of the glue above the shelf The opening a through the body of the pump into the bore thereof a, should of course extend above the bottom of the opening a through the plate C, for the highest ad ustment thereof, in order that there may be provided an escape for the surplus lue through such opening 0 in the body 0 the pump. After such adJuStment the machine 18 in readiness for use and the sides of the boxes are glued in bunches of suitable number by standing them on their tenon or dove tailed ends on the shelf I. The operation of the blade M in the reservoir D and beneath the shelf I causes a continual circulation, through the openings in this shelf 1, in such away as to prevent the separation of the glue above the shelf and the formation on the surface thereof of a skin of chilled glue which would otherwise be formed and would adhere in stringsto the sides of the box as they are removed and cause a smearing of the sides of the box or of the articles to be glued as they are be ng handled and also would result in a needless waste of considerable glue.

'charging reservoir, a glue -app va ve, a perforated shelf in said applying MMMMWMMMWWNev 4 MM. we

It is believed from the foregoing'descri tion of the glue applying machine in accor ance with our invention that the operation thereof and method of using the same is 5 sufiiciently clear to call for no further consideration herein. I

A pi e 1), connected with the heating jacket and provided with a valve V, discharges hot water therefrom into the upper end of a pum cylinder (1 to prevent the ac cumulation o hardened glue at the upper end thereof. The glue, as it is carried up wardly in the pump cylinder by the piston E, would tend to accumulate in a hardened lu'mass around the u per end of the pump cylinder and just su cient water is'thus discharged into the upper end of the pump cylinder, usuall in a very finestream' or in' a succession 0 drops, to soften the glue "which' would otherwise accumulate'in a hardened mass and interfere withthe'free operation of the pum The amount of glue which is thus carrie up to the upper end of the pump cylinder, while practically insignificant as to the loss incurred thereby,

frequently becomes sufficient to materia interfere with the successful operation of the pump. The glue as it thus accumulates and is softened or reduced to the li uid state is carried upwardly and dischar e over the upper edge of the pump cylin er and into the reservoir D.

\Vhat we claim is:

1. In a cement applyin'machine, a heating" jacket having suitab e inlet and'outle't connections, a g e pot supported in said jacket and comprising a receiving and a discharging reservoir, a glue applying reservoir supported in said jacket below and to (0 one side of said glue pot, a pipe leading from said discharging reservoir to said 8. plying reservoir and containing a regulable valve, a perforated shelf in said applying reservoir for supporting the articles 'to be cemented, a shaft extending through said tator.

2. In a cement applyln machine, a heating jacket having suitab e inlet and outlet connections, a gue pot supported in said jacket and comprising a receivin and a disng'rese'rvoir supported in said acket be ow and to one side of said glue pot, a pipe leading from said discharging reservoir to said appl 'ng reservoir and containing a regu'la e artaam reservoir for' supporting the articles to be cemented, a shaft extending through said shelf and means for revolubly and adjustably supporting the same, an agitator for maintaining a circulation of the cement in the' applying reservoir through the openings in sai she f, such'agitator comprising an arm carried by said shaft and located in the app'lfying reservoir below the perforated shel operating means connected to said shaft for causing the actuation of said agitator, means for automatically maintaining a variably and ad'ustably predeterminable depth of the liqu'i cement above said shelf comprising a pump located in the applying reservoir and arranged to receive the liquid cement therefrom and force the same into said receiving reservoir, means for actuating said pump, and means for variably predetermining the level above said shelf at which the liquid cement enters the pump.

In a cement applyin machine, a heating jacket having suitab e inlet and outlet connections, a heating reservoir supported in said 'acket, a glue applying reservoir suiporte in said jacket low and to one si e of said heating reservoir, a pipe leading from said heating reservoir to said applyin reservoir and containing a regulable va ve, a perforated shelf in said applying reservoir for supporting the articles to be cemented,'a shaft extending through said shelf and means for revolubly and adjustably supporting the same, an agitator for maintaining a circulation of the cement in the ap lying reservoir through the openings in'sal she f, such agitator comprising an arm carried by said shaft and located in the appl 'n reservoir below the perforated shelf a bell crank lever oscillably supported on said jacket, lneans for actuatin said lever, and connections between said ever and said shaft for causing an oscillatory movement of the shaft.

4. In a cement applyin machine, a heating jacket having suitab e inlet and outlet connections, a heating reservoir supported in said jacket, a glue applying reservoir su ported in said jacket below and to one si e of said heating reservoir, a pipe leading from said heating reservoir to said applying reservoir and containin a regulable valve, a perforated shelf in sai applying reservoir for supporting the articles to be cemented, a shaft extending through said shelf and means for revolubly and adjustably supporting the same, an agitator for maintaining a circulation of the cement in the appl in reservoir through the openings in said shel means for automatically maintaining a variahlyand adjustably predeterminable depth of the liquid cement above said shelf comprising a (pump located in the applying reservoir an arranged to receive t e liquid cement therefrom and force the same into said heating reservoir, means for variably reand said pump for causing the operation of determinin the level above said shel at said pump. which. the quid cement enters the ump, a bell crank lever oscillably supporte on said 5 jacket, means for actuating said lever, connections between said lever and said shaft Witnesses: for causin an oscillato movement of the MARTHA M. NELSON, shaft, an connections tween said lever Osnoimn F. GURNEY.

JOHN GELL. ROBERT GELL. 

